One Camera...or Two?

Hi, I just got a call from a past client who started her own Nurse Educator business and wanted a video of one of her classes, which are 2 days long. They use Powerpoint and Videos and at times dim the lights, there is also Q&A at the end. I plan on inserting the media in post production. I've shot hundreds of seminars with one camera, but they were mostly for "documenting" the event, this is to represent someone's business.

So my question is: would I benefit from two cameras? I'm thinking a 2nd camera would be mostly for "insurance", as I plan to keep the main camera on the teacher and follow the action. 2nd camera could be a wide shot of the room. I only have one camera, so I'd have to rent one...otherwise I'd just do it. Any thoughts on this? She wants a proposal ASAP.

Jeffrey S. Gould
Action Media Productions